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  • +44 (0)207 491 4777
  • contact@gcslab.co.uk
  • 30 New Bond Street, London W1S 2RN

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We are now pleased to welcome you again in the laboratory, thank you very much for your patience and support during this time.

WHO WE ARE

Gemmological Certification Services (or GCS) is an independent gemmological certificates provider for diamonds, gemstones and pearls. GCS is a leader in the analysis of mounted colored gemstones.

OUR PHILOSOPHY

We think the only way to meet the challenges that arise in the current market is to work in the same way that large internationals laboratories. This is why we use the same protocols and the same equipment (FTIR, Raman, XRF, Digital microradiography, UV and UV-Visible-NIR spectrometry …).

We also believe that to ensure the reliability and the accuracy of our results to our clients, it is necessary that the result is based on the analysis of several gemmologists. This is why we are three gemmologists and all our certificates contain two signatures.

All this to give our customers the excellence they deserve.

Verify the authencity of a GCS report

REPORT CHECK